Method of making paper boxes



Nov. 27, 1928. I 1,693,023

W. S. CLEAVES METHOD or warm PAPER BOXES Filed Sept. 29, 19 26 2 Sheets-Sheet 1 'Nov. 27, 1928. 1,693,023 w. s. CLEAVES vMETHOD OF MAKING PAPER BOXES Filed Sept. 29, 1926 2 Sheets-Shae 2 Patented Nov. .27, 1928.

UNITED STATES.

PATENT OFFICE.

WILLIAM S. CLEAVES, OF WOLLASTON, MASSACHUSETTS, ASSIGNOR T PNEUMATIC SCALE CORPORATION, LIMITED, OF QUINCY, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

METHOD OF MAKING PAPER BOXES.

Application filed September 29; 1926. Serial No. 138,459.

This invention relates to a method of making a covered paper box.

The invention has for an object to provide a novel method of making a covered paper box of the character in which the ends of the box are formed from end blanks separate from a blank forming the bottom and sides of the. box, and which method eliminates manufacturing expenses incident to the 1 method now in use.'

-'With this object in view, and such other objects as may hereinafter appear, the invention consists in the method and various steps thereof, hereinafter described and claimed.

In the drawing illustrating the preferred embodiment of the invention, Figure 1 is a perspective of a strip containing a plurality of body blanks; Fig. 2 a similar view illustrating. a single body blank; Fig. 3 a perspective view of the body blank after the sides have been folded; Fig. 4 a similar view of the blank with the end flanges at one end folded inwardly, and with the end blank affixed to the end flanges at the other end ofthe box; Fig. 5 is a plan-of a single end blank;

Fig. 6 a section on line 5-5 of Fig. 5; Fig. 7 a plan of a stripfrom which a plurality of end blanks may be formed; and Figs. 8 and 9 are diagrammatic views illustrating one -method of forming the covered body and end blanks respectively.

p In the manufacture of so-called covered paper boxes and particularly the covered paper boxes of the type emplo ed as shoe boxes and the like, the body 0 the box'is formed from a single blank of cardboard or similar fibrous material and the blank is usually creased and then folded to form the to sides and bottom of the box. The ends of the box are formed by individual end blanks separate from the body of'the box, which are.

adhesively secured to the sides and bottom of the box, and in practice end flanges are provided at the ends of the sides and bottom of the box which are bent inwardly and to which the separate end forming blanks are adhesively secured to form the ends of the finished box. At the present time uncovered paper boxes of this construction are produced by standard box making machines of the construction illustrated in the United States patent to Walter S. Davis No. 655,434, August 7, 1900. A single box making machine of this character is capable of producmga large number of boxes per day, in the neighborhood of'30,000, so that in order to manually wrap a covering sheet around the sides of the completed boxes and to fold the upper and lower edges of the covering sheet over the top and bottom edges of the sides and ends of the box, a large number of operators are usually employed.

One feature of the present invention aims to provide a method of making covered pa per boxes, and particularly covered paper boxes of the character at standard machines of the construction illustrated in the Davis patent above referred to, by which the manufacturing ex enses incident to the manualwrapping o a covering she-ct around the completed box are eliminated, and atcthe same time to provide a method by which the box forming operations may be performed by the standard box formmg machines.

Referring to the drawing, in accordance with the present method, the body blank 10 from which the bottom and sides of the box are to be formed is produced preferably from present made by a strip 12.0f the cardboard or other fibrous plished by suitable apparatus such as is diagrammaticallyillustrated in Fig. 8, wherein the covering strip or sheet 14 is fed from a roll 15 over paste rolls 16' by which adhesive is applied to the under surface thereof, and

thereafter the adhesive covering sheet 14 and the continuous strip 20 from which the blanks are to be formed are caused to pass between pressure rollers 22, 24, by which the covering is adhesively afiixed to one surface of the blank strip. The covering sheet 14 is preferably made of such a width and is applied to the blank strip 20 so as to leave projecting side edge portions which extend beyond the edges of-the blank strip, and the same are then folded over and adhesively secured upon the under side of the blank strip. In practice this folding operation may be accomplished by a suitably shaped folding sleeve 25 and presser rolls 26 through which the covered the end forming strip is drawn,

'ering the end blanks as illustrated in Fig. 8. The covered strip thus produced is preferably of a length suflicient to form a plurality of the covered blanks and is then creased longitudinally and transversely and cut or died out into the desired shape to form the body blank. In practice the creasing and cutting operations may be performed by creasing knives 30, 31, and the diamond shaped portions 32 may be cut out bya suitable shaped cutter 33, both being mounted on a driven roll 34, and with which a presser cooperates to support the covered strip during these operations." Thereafter the strip may be sevcred to form the individual blank 10 and the end'flanges formed upon the side forming portions and the bottom of each individual blank are subsequently, as will be described, folded inwardly during the subsequent box forming operation, and in their folded positions constitute end surfaces to which separate end forming blanks or pieces 40. are ad-- hesively secured in the formation of the pre-- ferred form of box.

Provision is also preferably made for covor end forming pieces 40 prior to their embodiment in the finished box, and for this purpose a covering sheet 42, preferabl in the form of a continuous strip or a widt slightly'greater than the width of piece or blank 40, is coated upon its under surface with adhesive by being passed over paste rolls 43, or in' any other suitable manner, and then the adhesive covering sheet 42 is applied to the end forming pieces 40 in such a manner as'to leave projecting portions extending beyond the sides of the end blank. As herein shown, both covering sheet and the end forming blanks are formed from continuous rolls 44,46, and aft the adhesive has been applied to one surface of the covering sheet 42, both strips may bepassed through pressure rollers 47, 48, and thereafter the projecting portions of the covering sheet may be folded over the sides of the end blank and adhesively secured on the opposite surface thereof by a suitable foldin sleeve 50 and presser rolls 52. The indivi ual covered end forming blanks 40 are then formed by cutting off predetermined blanks from the covered strip thus produced in any suitable manner as by the knife roll 56.

After the covered body blank 10 and the covered end pieces 40 have thus beenformed,

the body blank is folded upon the crease lines to form the sides of the box and also to turn in the end flanges to which the end pieces are to be secured. The individual covered end pieces are then adhesively afiixed to the ends of the body blank, preferably being adhesive- 1y secured to the surfaces formed by the inwardly turned end flanges. In practice these operations may and preferably .Will be performed by standard box forming machines of the construction illustrated in the above-mento which the end blanks neath a reciprocatory plunger of the exact size of the inside of the box to be produced. The plungeris forced downwardly and operates to force the body blank through a die or opening by which the sides of the box are bent up and the end flanges turned inwardly, the I blank having been previously creased to facilitate these operations.' Asthe plun er continues downwardly and carries the bo past the periphery of the paste rolls by which the'outer faces of the end flanges are coated with paste, thereafter the end blanks are automatically fed into position and applied to the end flanges under pressure by ressure heads. The box thus produced then rops from the plunger onto the conveyor where it is conve ed from the machine.

mm the description thus far, it will be observed that'the present method of producing the covered box is such as to permit the covering operation to be erformed by ....machiner of simple design an construction and by w ich the body blanks and end pieces may be covered in a rapid and economical manner. The character of the machinery necessary for plrforming these covering operations is sac that the operations may e performed with a minimum amount of manual labor, thus saving the expense in the manufacture of the covered box incident to the employment of a large number of operatives as is the case in the present manufacture of boxes of this character, wherein the covering operations are manually performed upon the completed box. In addition, the present method of producing thecovered box is such as to enable the standard box forming machines to be employed for folding the body blank and for applying the end pieces, thus enabling the manufacturer to utilize his present equipment in the manufacture of the improved covered paper box.

While the preferred embodiment of the in- I what y blank portion, side portions -in-- strip to form a plurality of individual detached end blanks, adheslvely aflixing finishing strips to the outer surfaces of both cardboard strips before formation of the blanks, and folding, while the cardboard is in strip form, the finishing material over the side edges of the first strip and over the side edges of the end formin strip, and thereafter assembling a body b ank and two of the detached end blanks in box forming relation and adhesively afiixing the end blanks to said end flanges.

2. The method of making a double ended box, which consists in withdrawing from a supply roll, a cardboard strip of a width sufiicient to form a body blank comprising a bottom ,portion and side portions integral with the bottom portion, withdrawing from another supply roll a second cardboard strip of a width equal to the height of the box,

adhesively affixing finishing strips to the.

outer surfaces of said cardboard strips, folding the finishing material over the side edges of the side portions of the body blank and over one side edge of the second strip, severforming relation, and adhesively aflixing the end blanks to the ends of the bottom and sides of said body blank toform the box.

3. The herein described method of making a double ended box, which consists in withdrawing from a supply roll a cardboard strip of a width such as to form a body blank comprising the bottom portion and side portions integral with the bottom portion, withdrawing a second cardboard strip from a second supply roll, adhesively afiixing finishing material inhstrip form to the outer surfaces of said cardboard strips and forming from the composite strips thus formed a double ended box having separate end blanks afiixed to the ends of the bottom and integral sides of the body blank and having finishing material lapped over the upper edges of the sides and ends of the box to finish the same.

In testimony whereof I have signed my name to this specification.

- WILLIAM S. CLEAVES. 

